Farming

We just got some lovely news about some yummy hay that bunnies are fond of.  We're thinking of planting a large patch in the back yard now, and possibly doing away with Brother's catnip patch.  Oh, we can see it now, a big batch of hay, and bunnies hopping in, to party, eat and play with us!  We bet we could make loads and loads of bunny friends with a yummy crop like that.  Does anyone know how long it takes hay to sprout?